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Damper closes by itself

Hello, I need some help from a specialist. I am an owner of a condo. In our condo we have a fire/smoke damper set up. Keeping these dampers open allow air conditioning and heating to flow throughout the three story condo nicely. For some reason, one of my dampers closes for no reason which does not allow air to come down to a part of the bottom level. I go up to the attic and flip a switch(Just like a wall light switch) nothing happens. When I click it back up the damper opens, which is what I want. But for some reason the actuator reacts after about 5 minutes and the damper closes again. In the damper their is what looks like a smoke alarm, and this does light up with redlights when the damper closes. I have to open a door on top of the damper to see it.

I am wander what is causing this? I would like to fix this myself if possible. Thanks you!

Sometimes smoke detectors fail or get dirty and give false indicators. The damper is in place to prevent the AC system from circulating air during a fire. This will slow the spread of the fire and allow you a little more time to escape. Call an AC company, I'd recommend one that also does residential and light commercial or residential and commercial work, many strictly residential technicians don't have a clue about fire dampers and smoke detectors.

“I am for doing good to the poor, but...I think the best way of doing good to the poor, is not making them easy in poverty, but leading or driving them out of it. I observed...that the more public provisions were made for the poor, the less they provided for themselves, and of course became poorer. And, on the contrary, the less was done for them, the more they did for themselves, and became richer.”
― Benjamin Franklin